How do you choose the power of an electric heater?
Electric heater power
The power indicates how powerful the heater is. An electric heater with 2000W of power can heat a larger room than a heater with 100-0W of power. To compare electric heaters, we use the power to calculate the surface area the heater can heat. We distinguish well and poorly insulated rooms, because you need more power to heat a poorly insulated room than a well-insulated room.
Difference in power per insulation level
Poor insulation: 50W
Was your house built before 1975, does it have thin layers of insulation, single-paned glass or a cat flap that opens often, for example? We consider this poor insulation, so the heater needs 50W to heat 1m3. This means that a 1000W heater can heat 20m3 in this case.
Good insulation: 35W
Do you live in a newly built house or a house with thick layers of insulation, with at least double-paned windows and few air holes? The heater needs 35W to heat 1m3. This means that a 1000W heater can heat 28.5m3 in this case.
Calculate the power for your room
Want to know how much power a heater needs for your room? First, calculate how many cubic meters the room is. You can do this with the following sum: length x width x height.
For example: 6m x 5m x 2.5m = 75m3
Multiply this result by the power that corresponds to the insulation of your room.
Example of poor insulation: 75m3 x 50W = 3750W So you need 3750W of power to heat this room.
